摘要
The process of laser cladding procedure has a closely relation with properties of composite cladding layers. When the input power of laser is certain, the low scanning velocity makes substrate with ahead of laser beam heat for a long time, which worsens interface bonding from surface oxidized; much higher scanning velocity makes the powder’s synthesis near substrate uncompleted fully, the remained powder in interface worsens interface bonding as well. Otherwise, the input specific energy of laser influences on in-situ synthesis courses. If the input energy is lower, the synthesis is not completed fully. In addition, the low temperature effects not only restrict the dispersion of particle leading uneven distribution of TiC, but also form some regions consisting of Al and Al 3Ti.
The process of laser cladding procedure has a closely relation with properties of composite cladding layers. When the input power of laser is certain, the low scanning velocity makes substrate with ahead of laser beam heat for a long time, which worsens interface bonding from surface oxidized; much higher scanning velocity makes the powder's synthesis near substrate uncompleted fully, the remained powder in interface worsens interface bonding as well. Otherwise, the input specific energy of laser influences on in-situ synthesis courses. If the input energy is lower, the synthesis is not completed fully. In addition, the low temperature effects not only restrict the dispersion of particle leading uneven distribution of TiC, but also form some regions consisting of Al and Al 3Ti.
基金
National Natural Science Foundation ofChina (No.5 98710 3 8)
